Ambystoma annulatum Cope, 1886

Physical Build

The ringed salamander, scientifically named Ambystoma annulatum Cope, 1886, has a slender body, small head, and long tail. This species has 15 costal grooves (grooves running along the rib region) and a flattened, rounded snout.

Dental Features

It has two rows of vomerine teeth—teeth located on a thin bone that forms the lower and back portion of the nasal septum, which divides the nostrils. Each tooth row holds between 7 and 11 teeth.

Limb Characteristics

Each of the species' hind feet has five toes.

Adult Coloration

Adult dorsal (back) coloration ranges from dark gray to blackish brown, patterned with white to yellowish bands and pale dots. The ventral (belly) side is usually grayish-yellow.

Juvenile Color Development

Newly metamorphosed juvenile ringed salamanders have black backs, white bellies, and a row of pale spots running from the forelimbs to the tail. Yellow bands begin to develop soon after metamorphosis, and full adult coloration is formed within two months of metamorphosis.

Terrestrial Habitat Use

The ringed salamander is a fully terrestrial species, found in hardwood forests and mixed hardwood-pine forests. Outside of the breeding season, adult ringed salamanders hide under leaf litter, rotting logs, or abandoned ground holes in damp forest areas.

Aquatic Juvenile Habitat

Larvae and juveniles live in small, fishless, semi-permanent ponds.

Geographic Distribution

Most ringed salamanders occur near Hot Springs, Arkansas, and the Missouri section of the Ozark Plateau, with small populations also found in eastern Oklahoma. This species is endemic to the Ozark Plateau and the Ouachita Mountains of southern Missouri, Arkansas, and eastern Oklahoma.

Range Comparison

It has a far more restricted geographic range than other species in the same genus, such as Ambystoma maculatum and Ambystoma opacum.

Pond Drying Impacts

Habitat loss and related changes impact the ringed salamander in specific ways. While late summer pond drying has strong negative effects on spring-breeding species like the spotted salamander, it has little impact on the ringed salamander.

Breeding Rainfall Effects

However, reduced rainfall and fewer filled ponds during September and October can cause a large drop in the ringed salamander's breeding activity and egg laying.

Forest Cover Associations

Average canopy cover and leaf litter depth do not have a significant connection to whether the species occupies a site, but continuous forest cover is strongly associated with the breeding wetlands the species uses.

Clear-Cutting Impacts

Clear-cut timber harvesting has a negative effect on the species' distribution. Forest sites after clear-cutting have more open canopies, which leads to higher ground temperatures.

Dispersal Vulnerability

To survive, ringed salamanders either retreat underground into burrows or move to other locations. Small-bodied juveniles and adults are more vulnerable to these changes, as they have lower dispersal abilities.